What is 11SMnPb37 free-cutting structural steelLarge Diameter Q235B SSAW/SAWH Spiral Carbon Steel Pipe On Sales

11SMnPb37 belongs to the German standard free-cutting steel, and the implementation standard is "DIN EN 10087-1999". It is mainly used in the production of instruments, watch parts, automobiles, machine tools and other various machines that are subject to small forces but have strict requirements on size and finish. They have strict requirements on dimensional accuracy and finish, but relatively low mechanical performance requirements. Low standard parts.

11SMnPb37 is a special lead-sulfur composite free-cutting structural steel that is widely used in automatic lathes and other mechanical processing fields. This steel is characterized by tiny lead particles distributed within it, which act as lubrication during the cutting process, thereby significantly improving the cutting performance of the steel.

11SMnPb37 is a German standard free-cutting steel that contains lead and sulfur and is used in mechanical processing fields such as automatic lathes. It has excellent cutting performance and mechanical properties, and is suitable for occasions with strict requirements on high precision and smooth finish. It has good heat treatment and processing properties and is widely used in instrumentation, automobiles, machine tools and other fields. Comply with international standards and have broad application prospects

Chemical composition and processing propertiesNickel 201/UNS N02201 sheet/bar/pipe

Chemical composition

‌The chemical composition of 11SMnPb37 includes carbon (C) ≤0.14%, silicon (Si) ≤0.05%, manganese (Mn) 1.0 - 1.5%, phosphorus (P) ≤0.11%, sulfur (S) 0.34 - 0.4%, and lead (Pb) 0.2 - 0.35%. ‌ The combination of these elements not only affects the strength and durability of the material, but also determines its applicability in different application areas. ‌ The mechanical properties of 11SMnPb37 include yield strength between 340-550MPa, tensile strength between 410-570MPa, and elongation of 8-20%. ‌ These data show that 11SMnPb37 has high strength and toughness and is suitable for manufacturing parts that need to withstand certain loads and harsh working environments. ‌ Relationship between composition and performance ‌ Carbon (C): Carbon content ≤0.14%, which helps to improve the hardness and tensile strength of the material, and is suitable for parts that are subject to high loads and wear, such as gears and bearings. ‌ ‌Manganese (Mn): The content is 1.0-1.5%, which improves the strength, toughness and wear resistance of steel and is suitable for manufacturing parts that withstand impact and vibration.

‌Lead (Pb): The content is 0.2-0.35%, mainly used to improve machinability, reduce friction during cutting, reduce tool wear, and is suitable for manufacturing precision mechanical parts.

‌Sulfur (S) and phosphorus (P): The sulfur content is 0.34-0.4%, and the phosphorus content is ≤0.11%. Appropriate sulfur improves machinability and phosphorus improves steel strength, but too high a content may cause brittleness.

Mechanical properties

The mechanical properties of 11SMnPb37 depend on the heat treatment state and thickness of the material. This steel is usually cold drawn to improve its strength and hardness. Depending on the thickness range, its tensile strength, yield point, elongation or elongation after fracture and hardness have different standard requirements. For example, for cold drawn materials with a thickness of 5mm to 10mm, its tensile strength is between 510~810 MPa, the yield point is not less than 440 MPa, the elongation or elongation after fracture is not less than 6%, and the hardness is between HBW 160-217.

Heat Treatment

The heat treatment of 11SMnPb37 is critical to its final properties. Usually, this steel is cold drawn and sometimes annealed to improve its plasticity and toughness. During the heat treatment process, the temperature and cooling rate must be strictly controlled to avoid unnecessary stress and deformation.

Machinability

The cutting performance of 11SMnPb37 is excellent, which is due to the lubrication effect of the lead particles inside it during the cutting process. The chips of this steel are fine, which reduces friction and heat during the processing, thereby improving processing efficiency and the surface quality of the workpiece.

Application areas of 11SMnPb37 free-cutting structural steelHaynes 188/UNS R30188 sheet/bar/pipe

11SMnPb37 is widely used in many industries due to its high strength, wear resistance and good machinability:

Automotive industry: used to manufacture parts such as gears, bearings and connecting rods.

Machinery manufacturing: suitable for manufacturing parts that are subject to high loads and wear, such as gears and bearings.

Other industrial applications: used to manufacture various mechanical parts and structural parts in engineering projects.

Due to its excellent cutting performance and good mechanical properties, 11SMnPb37 is widely used in automatic lathe processing, precision machinery parts manufacturing, instrumentation manufacturing, automobile parts production, machine tool accessories processing and other fields. Especially in applications with strict requirements on dimensional accuracy and surface finish, 11SMnPb37 is an ideal choice.